PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the ventricles relax
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blood flows from the ventricles into the atria
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the AV valves are open
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blood flows from the ventricles to the pulmonary arteries
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Detailed explanation-1: -Contractions in the right ventricle provide pulmonary circulation by pulsing oxygen-depleted blood through the pulmonary valve then through the pulmonary arteries to the lungs.
Detailed explanation-2: -During ventricular systole, pressure rises in the ventricles, pumping blood into the pulmonary trunk from the right ventricle and into the aorta from the left ventricle. Again, as you consider this flow and relate it to the conduction pathway, the elegance of the system should become apparent.
Detailed explanation-3: -So, what happens during ventricular systole is that the contraction of the ventricles creates a pressure gradient due to which the blood is ejected out from the ventricles to the pulmonary and the systemic blood circulation. This is known as the ejection phase.
Detailed explanation-4: -During diastole, when the heart muscle is relaxed, the blood flows freely through the atria, due to the difference between the high pressure of systemic and pulmonary circulations and the low pressures in the chambers, and through the open atrioventricular valves into the ventricles.